Balance the following equation-Al2O3 - H2SO4 -Al2SO43 - H2O

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Standard VIII

Chemistry

Balancing Chemical Equation

Balance the f...

Question

Balance the following equation:
Al₂O₃ + H₂SO₄ $\to$ Al2(SO₄)₃ + H₂O

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Solution

Balanced chemical equation:
A chemical equation in which the numbers of atoms of each element on both the sides of the equation is equal is called balanced equation.
Step 1 : Representation of the chemical reaction
Al₂O₃ + H₂SO₄ $\to$ Al₂(SO₄)₃ + H₂O
_{Step 2 : Calculating the number of atoms on both side of reaction}
Elements Number of atoms on reactant side Number of atoms on product side
Al 2 2
H 2 2
O 7 13
S 1 3
_{Step 3: Balancing the uneven numbers of atoms on both the side of reaction}
as the number of aluminum and hydrogen atoms is equal but number of oxygen and Sulphur atoms are unequal. So balancing these can be done by multiplying the required coefficient for them in the reaction.
to make atoms equal, on reactant side ‘ 3 ’ will be multiplied with Sulphuric acid(H₂SO₄) and on product side ‘ 3 ’ will be multiplied with water(H₂0).
i.e.
Al₂O₃ + 3H₂SO₄ $\to$ Al₂(SO₄)₃ + 3H₂O
Elements Number of atoms on reactant side Number of atoms on product side
Al 2 2
H 2 2
O 15 15
S 3 3
Hence, the equation is balanced.
Al₂O₃(s) + 3H₂SO₄(aq) $\to$ Al₂(SO₄)₃ (aq) + 3H₂O (l)
Aluminum oxide Sulfuric acid Aluminum sulfate Water.

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Q. Balance the following equation by oxidation number method.

A l + K M n O_{4} + H_{2} S O_{4} \to A l_{2} (S O_{4})_{3} + K_{2} S O_{4} + M n S O_{4} + H_{2} O

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After balancing the reaction, what would be the coefficients of all the reactants and products?

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Na + O_{2} \underset{}{\to} {Na}_{2} O

(ii)

H_{2} O_{2} \underset{}{\to} H_{2} O + O_{2}

(iii)

Mg (OH)_{2} + HCI \overset{}{\to} {MgCl}_{2} + H_{2} O

(iv)

Fe + O_{2} \underset{}{\to} {Fe}_{2} O_{3}

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Al (OH)_{3} \underset{}{\to} {Al}_{2} O_{3} + H_{2} O

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{Al}_{2} ({SO}_{4})_{3} + NaOH \underset{}{\to} Al (OH)_{3} + {Na}_{2} {SO}_{4}

(viii)

{HNO}_{3} + Ca (OH)_{2} \underset{}{\to} Ca ({NO}_{3})_{2} + H_{2} O

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NaOH + H_{2} {SO}_{4} \underset{}{\to} {Na}_{2} {SO}_{4} + H_{2} O

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{BaCl}_{2} + H_{2} {SO}_{4} \underset{}{\to} {BaSO}_{4} + HCl

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Elements	Number of atoms on reactant side	Number of atoms on product side
Al	2	2
H	2	2
O	7	13
S	1	3

Balance the following equation:
Al₂O₃ + H₂SO₄ $\to$ Al2(SO₄)₃ + H₂O

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Balance the following equation:Al2O3 + H2SO4 →Al2(SO4)3 + H2O

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Balance the following equation:
Al₂O₃ + H₂SO₄ $\to$ Al2(SO₄)₃ + H₂O